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style-serializer.js
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style-serializer.js
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const isRfc3986Reserved = (char) => ":/?#[]@!$&'()*+,;=".indexOf(char) > -1;
const isRfc3986Unreserved = (char) => /^[a-z0-9\-._~]+$/i.test(char);
// eslint-disable-next-line default-param-last
export function encodeCharacters(str, characterSet = 'reserved') {
// In ES6 you can do this quite easily by using the new ... spread operator.
// This causes the string iterator (another new ES6 feature) to be used internally,
// and because that iterator is designed to deal with
// code points rather than UCS-2/UTF-16 code units.
return [...str]
.map((char) => {
if (isRfc3986Unreserved(char)) {
return char;
}
if (isRfc3986Reserved(char) && characterSet === 'unsafe') {
return char;
}
const encoder = new TextEncoder();
const encoded = Array.from(encoder.encode(char))
.map((byte) => `0${byte.toString(16).toUpperCase()}`.slice(-2))
.map((encodedByte) => `%${encodedByte}`)
.join('');
return encoded;
})
.join('');
}
export default function stylize(config) {
const { value } = config;
if (Array.isArray(value)) {
return encodeArray(config);
}
if (typeof value === 'object') {
return encodeObject(config);
}
return encodePrimitive(config);
}
export function valueEncoder(value, escape = false) {
if (Array.isArray(value) || (value !== null && typeof value === 'object')) {
value = JSON.stringify(value);
} else if (typeof value === 'number' || typeof value === 'boolean') {
value = String(value);
}
if (escape && value.length > 0) {
return encodeCharacters(value, escape);
}
return value;
}
function encodeArray({ key, value, style, explode, escape }) {
if (style === 'simple') {
return value.map((val) => valueEncoder(val, escape)).join(',');
}
if (style === 'label') {
return `.${value.map((val) => valueEncoder(val, escape)).join('.')}`;
}
if (style === 'matrix') {
return value
.map((val) => valueEncoder(val, escape))
.reduce((prev, curr) => {
if (!prev || explode) {
return `${prev || ''};${key}=${curr}`;
}
return `${prev},${curr}`;
}, '');
}
if (style === 'form') {
const after = explode ? `&${key}=` : ',';
return value.map((val) => valueEncoder(val, escape)).join(after);
}
if (style === 'spaceDelimited') {
const after = explode ? `${key}=` : '';
return value.map((val) => valueEncoder(val, escape)).join(` ${after}`);
}
if (style === 'pipeDelimited') {
const after = explode ? `${key}=` : '';
return value.map((val) => valueEncoder(val, escape)).join(`|${after}`);
}
return undefined;
}
function encodeObject({ key, value, style, explode, escape }) {
const valueKeys = Object.keys(value);
if (style === 'simple') {
return valueKeys.reduce((prev, curr) => {
const val = valueEncoder(value[curr], escape);
const middleChar = explode ? '=' : ',';
const prefix = prev ? `${prev},` : '';
return `${prefix}${curr}${middleChar}${val}`;
}, '');
}
if (style === 'label') {
return valueKeys.reduce((prev, curr) => {
const val = valueEncoder(value[curr], escape);
const middleChar = explode ? '=' : '.';
const prefix = prev ? `${prev}.` : '.';
return `${prefix}${curr}${middleChar}${val}`;
}, '');
}
if (style === 'matrix' && explode) {
return valueKeys.reduce((prev, curr) => {
const val = valueEncoder(value[curr], escape);
const prefix = prev ? `${prev};` : ';';
return `${prefix}${curr}=${val}`;
}, '');
}
if (style === 'matrix') {
// no explode
return valueKeys.reduce((prev, curr) => {
const val = valueEncoder(value[curr], escape);
const prefix = prev ? `${prev},` : `;${key}=`;
return `${prefix}${curr},${val}`;
}, '');
}
if (style === 'form') {
return valueKeys.reduce((prev, curr) => {
const val = valueEncoder(value[curr], escape);
const prefix = prev ? `${prev}${explode ? '&' : ','}` : '';
const separator = explode ? '=' : ',';
return `${prefix}${curr}${separator}${val}`;
}, '');
}
return undefined;
}
function encodePrimitive({ key, value, style, escape }) {
if (style === 'simple') {
return valueEncoder(value, escape);
}
if (style === 'label') {
return `.${valueEncoder(value, escape)}`;
}
if (style === 'matrix') {
return `;${key}=${valueEncoder(value, escape)}`;
}
if (style === 'form') {
return valueEncoder(value, escape);
}
if (style === 'deepObject') {
return valueEncoder(value, escape);
}
return undefined;
}